Overview
The L6564H is a current-mode Power Factor Correction (PFC) controller developed by STMicroelectronics. It operates in transition mode (TM) and incorporates advanced features to ensure high efficiency and compliance with energy-saving regulations. The IC is particularly suited for applications requiring high power factor and low total harmonic distortion (THD), making it ideal for high-end AC-DC adapters, chargers, and Switch-Mode Power Supplies (SMPS) exceeding 400 W.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Voltage range (HVS pin) | -0.3 to 700 | V |
| Supply voltage (VCC) | 10.3 to 22.5 | V |
| Startup current | ≤ 100 µA | µA |
| Operating bias current | ≤ 6 mA | mA |
| Internal reference voltage accuracy | 1% @ TJ = 25 °C | % |
| Gate driver output current | -600/+800 mA | mA |
| Junction temperature operating range | -40 to 150 | °C |
| Storage temperature | -55 to 150 | °C |
| Package | SO-14 |
Key Features
- Onboard 700 V startup source
- Fast bi-directional input voltage feedforward (1/V2 correction)
- Accurate adjustable output overvoltage protection
- Protection against feedback loop disconnection (latched shutdown)
- Inductor saturation protection
- AC brownout detection
- Low startup current (≤ 100 µA)
- 6 mA max. operating bias current
- 1% (@ TJ = 25 °C) internal reference voltage
- -600/+800 mA totem pole gate driver with active pull-down during UVLO
Applications
- PFC pre-regulators for high-end AC-DC adapters/chargers
- IEC61000-3-2 or JEITA-MITI compliant SMPS, in excess of 400 W
- SMPS for LED luminaires
Q & A
- What is the primary function of the L6564H IC?
The L6564H is a current-mode Power Factor Correction (PFC) controller operating in transition mode (TM).
- What is the voltage range of the HVS pin?
The HVS pin can withstand a voltage range from -0.3 V to 700 V.
- What is the typical operating bias current of the L6564H?
The operating bias current is typically 6 mA or less.
- What kind of protection does the L6564H offer against feedback loop failures?
The IC provides protection against feedback loop disconnection, which results in latched shutdown.
- What is the accuracy of the internal reference voltage at 25 °C?
The internal reference voltage has an accuracy of 1% at 25 °C.
- What is the maximum current capability of the gate driver output?
The gate driver output can source up to 600 mA and sink up to 800 mA.
- What are the typical applications of the L6564H?
Typical applications include PFC pre-regulators for high-end AC-DC adapters/chargers, IEC61000-3-2 or JEITA-MITI compliant SMPS, and SMPS for LED luminaires.
- What is the package type of the L6564H?
The L6564H is packaged in an SO-14 package.
- How does the L6564H handle AC brownout conditions?
The IC includes AC brownout detection to safely handle such conditions.
- What is the junction temperature operating range of the L6564H?
The junction temperature operating range is from -40 °C to 150 °C.
